Screening mechanism



Feb. Z3, 1932. H. H. BARBER 1,846,669

SCREENING MECHANISM Filed Oot. 7, 1929 @Sheets-Sheet l Feb. 23, 1932. H. H, BARBER SCREENING MEGHANISM Filed Oct. 7, 1929 5 Sheets-Shes?l 2 Feb. 23, 1932. H. H. BARBER SCREENING MEGHANISM Filed Oct. 7, 1929 .3 Sheets-Sheet 3 L@ m 4. .m

Patented Feb. 23, 1932 UNITED YSTATES PATENT OFFICE HARRY I-I. BARBER, OF AURORA, ILLINOIS, ASSIGNOR TO iBARBER-GREENE COMPANY, f

0F AURORA, ILLINOIS, A CORPORATION 0F ILLINOS i SCREENING MECHANISM Application led. October 7, 1929.

V' part of a conveyor embodying my novel screening mechanism.

Figure 2 is an enlarged sectional view through the Vibrating mechanism for the screens.

Figure 3 isa rear end elevational view of the conveyor showing the screening mechanism with the vibrator omitted.

Fig. 4 is an enlarged fragmentary vertical sectional view taken transversely of the upper screen.

Fig. 5 is an enlarged sectional view taken upon the line V--V ot' Fig. 4.

In the drawings there is shown a part of ,x a conveyor including a part of the-'frame work and a part of the conveyor boom 1 which elevates the material through'the usual buckets to the screens. The elevated material first drops upon an inverted V-shaped screen 2 which intercepts the coarse particles which gravitate down the sides of the screen 2 and into chutes 2a which guide the particles to a belt conveyor 3 which conveys the coarse particles to one side of the machine. The intermediate and tine particles pass through the mesh of the inverted. V-shaped screen and descend upon a second screen 4 which is a plain one that slopes downwardly and rearwardly and discharges the intermediate particles through a chute 5 at the end thereof.

i i The line particles escape through the mesh ot the screen 4 and drop upon an inclined chute 6 (Figure 1) which conveys the same to the belt conveyor for discharging the saine upon one side of the machine with the coarse particles.

Serial No. 397,911.

A vibrator 7 is mounted upon the screen 4. This vibrator which is well known consists of aliousing iii which a shaft 8 is Journaled.

'A cam y9 is keyed upon this shaft and a tappet lever 10 which is pivoted intermediate its ends 55 in said housing is operated by saidocain. This rlever projects through the housing and operates a spring controlled tappet 11 which is provided with a shoe 12 (Figure 3) upon its lower end for engaging the screen-4. The shoe 60 12 has a rod 18 connected at one end and the other end of said rod is connected to the apex Vof the screen 2 as shown in Figure 1, whereby Athe vibrator is susceptible of operating or ,Vibrating both screens simultaneously. The i5 casing for the upper screen is provided witha pair of lateral abutments or shoulders 14 and coil springs 15 are mounted between these shoulders and the top of the screen.

The sides of the screen 4 consists of chan-` nel members 16 with their flanges directed outwardly as shown in Figures 3 and 4. The rameof the screen 2 comprises vertical posts 17 upon one end which are secured to plates laupon the channel members 16 as shown.' more clearly in. Fig. 5 and vertical posts 18 upon the other end which are secured to the channels 16, the channels 16 being cut away at this end to clear the screen 2. The tops of the posts 17 and 18 are connected by angle {3 0 members 23. These posts 17 and 18 support the side plates 19 of the frame. A link 2O is secured to the upper end of the frame of the screen 4. This link is connected at its lower end to a lever 21 that moves over a locking; K segment 22 whereby the inclination of the screen 4 may be varied. During such adjustments of the screen 4, the screen 2 will be I therefore do not purpose limiting the patent granted hereon otherwise than necessitated by the prior art.

I claim as my invention:

l. In a loader, a screen, chutes upon the sides of the screen, a belt conveyor beneath said chutes, a second screen beneath said lirst screen for receiving the fine and intermediate particles from said first screen, a chute beneath said second screen for conveying the ne particles to said belt conveyor, means for conducting the intermediate particles from said second screen and means for vibrating said screens.

2. In a loader, a lower inclined screen, an

upper inverted V-shaped screen restingupon the lower screen, a vibrator upon the lower screen having a vibrating member engaging said lower screen and a connection between said vibrating member and the apex of said V-shaped screen.

3. The combination with an inclined screen, an inverted V-shaped screen resting upon said inclined screen, a vibrator acting upon said inclined screen and a connection between said vibrator and said V-shaped screen.

4. In a loader, the combination with a conveyor boom, an inverted V-shaped screen beneath the upper end of said boom for receiving material therefrom, chutes extending from the sides of said screen for receiving the coarse particles, a belt conveyor for receiving the coarse particles, an inclined screen beneath said V-shaped screen for receiving the line and intermediate particles, and a chute for conducting the line particles to said belt conveyor.

In testimony whereof I have hereunto subscribed my name at Aurora, Kane County,

Illinois.

HARRY I-I. BARBER. 

